Resistance to mechanically small fatigue crack growth in ultrafine grained interstitial-free steel fabricated by accumulative roll-bonding
作者: X. LinM. KoyamaS. GaoN. TsujiK. TsuzakiH. Noguchi
作者单位: 1Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395, Japan
2Department of Materials Science and Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
刊名: International Journal of Fatigue, 2018, Vol.118
来源数据库: Elsevier Journal
DOI: 10.1016/j.ijfatigue.2018.09.002
关键词: Crack closureCrack shapeSmall crackAccumulative roll bondingUltrafine-grained steel
英文摘要: Abstract(#br)Effects of ultrafine grain refinement on fatigue crack growth were investigated using an interstitial-free (IF) steel with a grain size of 590 nm produced by accumulative roll bonding. The fatigue properties and associated microstructures were characterized by fully reversed bending fatigue tests, replica method coupled with optical microscopy, and electron backscattering diffraction measurements near the fracture surfaces. Compared with a coarse-grained IF steel tested at the same stress amplitude, the fatigue strength of ultrafine-grained steel was higher, which was attributed to an increase in hardness. Compared with the coarse-grained steel at the same ratio of stress amplitude to hardness, the crack growth rates in the ultrafine grained steel were higher in the...
全文获取路径: Elsevier  (合作)
影响因子:1.976 (2012)

  • ultrafine 超细的
  • mechanically 用机械
  • steel 
  • grained 粒状的
  • fabricated 制造
  • growth 生长
  • crack 裂隙
  • fatigue 疲劳
  • accumulative 累积
  • bonding 焊接